Phee hoff and john w



(No Model.)

J. 0. LEE.

BOOT OR SHOE-BURNISHING MAGHINE.

No. 362,020. Patented Apr. 26, 1887.

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UNITED STATES PATENT OFFICE..-

JOHN 0. LEE, or ST. PAUL, MINN., ASSIGNOR OF TWO-THIRDS TO CHRISTO- PHER HOFF AND JOHN w. SHANNAHAN, BOTH or sAME PLAcE.

BOOT OR SHOE BURNI SHING MACHINE.

$PECIPICATION forming part of Letters Patent No. 362,020, dated April 26, 1887.

Application tiled October 8, 1886. Serial No. 9.15.749. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN 0. LEE, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Boot or Shoe Burnishing Machines, of which the following is a specification.

This invention relates to machines for burnishing the shanks, top lifts of the heels, and the edges of the soles of boots or shoes and other parts requiring such treatment; and it consists in the one or more oscillating arms or levers carrying the burnishers,so arranged that the strains are uniformly distributed and the bu rnishers rendered flexible, so that vibrations of the frame of the machine and the work be ing operated on are prevented, substantially as hereinafter set forth. 7

In the drawings, Figure 1 is a front elevation of the frame of the machine with the burnisher-arms removed to exhibit more clearly the construction of the cam-wheel. Fig. 2 is a side view of the machine, partiall yin section. Fig. 3 is a plan view of the machine complete, these three figures showing the machine adapted to burnish the shanks and the top lifts of the heels. Fig. 4 is a sectional side view of a portion of the upper part of the machine, showing the slight modification necessary to adapt it to burnish the edges of the soles and other narrow parts. Fig. 5 is an enlarged sectional detail of the mechanism for holding the burnishing'tool in the head of the burnisher-bar.

A represents the frame of the machine, having the main driving-shaft A journaled across its lower part and the cam-shaft A journaled across the upper part, as shown, the cam-shaft adapted to be driven by a belt from the main shaft.

B is a drum having a zigzag sinuous canigroove, a, in its rim, and D D are two burnisher arms or levers pivoted at Z) to the frame, and curved to partially encompass the camdrum, and with anti-friction rollers (Z on their ends fitting into the cam-groove a, so that the revolution of the cam-drum will cause the burnisher-levers D to oscillate upon their pivots. In the outer ends of each of the burnisher-levers D a burnisher bar, D is fitted and 1 other suitable device.

adapted to slide inward and outward, but will be prevented from turning by a feather or The rear ends of these burnisher bars are smaller than their outer ends and are surrounded by springs 6 within the arms, as shown, and provided with collars e upon their shanks, against which the springs rest, the collars thus acting as buffers, by which the springs are compressed when the burnisher-bars are pushed inward. The outer ends of the burnisher-bars are enlarged and formed with sockets, into which the burnishers g are held by set-screws.

The springs e are powerful enough to resist inward .pressure to a large extent, but will give 7 and be compressed when strongpressure is brought to bear upon them, rendering the burnisherbars elastic or flexible, so that they will adapt themselves to the irregularities and curves of the work being acted upon.

I have shown two of the burnisher levers and bars with two burnishers, 9: but it is evident that only one set may be used,i.f required, althoughgencrally two will be used. as by that means two operators can work at one machine at the same time.

The burnishers are shown removable from their respective bars, so that different-formed burnishers for different kinds of work may be placed therein, or broken or worn'out burnishers replaced by new ones.

Gasburners h are shown arranged beneath the burnishers g and connected by flexible tubes t to the supply-pipes m, so that the requisite heat may be supplied to the burnishers. The tubes are connected to the burnisher-levers so as to oscillate with them, and

thus keep the flame of the gas-jet constantly in contact with the rear of the burnisher.

This arrangement of burnisher will be employed in burnishing the shanks and other parts requiring the work to be held so asto press against the burnishers in ahorizontal line, or inward toward the frame of the machine; but in burnishing the edges of the soles and other parts requiring an upward pressure a slight modification of the manner of arranging the burnisher levers and bars will he made, as shown in Fig. 4. This consists in forming the outer ends of the burnisher-levers D inclined upward and outward and pivoting at n in each burnisher-lever D the burnisher-bar D, the latter adapted to receive the burnisher g with its working-face downward. A flat or other spring, 6 will be placed between the burnisher-bar and burnisher-lever to serve the same purpose as the spring e in: the construction shown in Figs. 2 and 3. The gas-jet for heating the burnishers will also be attached to the burnisher-lever when the construction as shown in Fig. 4 is employed, in the same manner as in Fig. 2.

I claim several important advantages by this manner of arranging the burnisher levers and bars. The presence of the springs 6 6 whereby the burnisher-bars are made flexible, is a very important feature, as the burnishers will yield when the work is pressed against them, thus causing the burnisher to follow all the irregularities of the surfaces of the shoe or boot, and preventing the vibrations being imparted to the work being held, or to the hands of the operator. The springs thuspracticallyeliminatethevibrationscaused by the burnishers, which is a very great advantage in machines of this character, the severe jarring to which the operatives are subjected where the burnishers are rigid greatly militating against them heretofore. The severe jarring of the work in machines as heretofore constructed has also been found detrimental to the health of the operatives, as well as injurious to the machine.

By pivoting the burnisher-bars at a point at or near their centers, the strains are distributed evenly throughout the whole extent of the lever-arms, greatlylessening the danger of breakage from unequal strains and rendering the action more uniform, and preventing to a large extent the formation of vibrations in the frame of the machine. The use of the cam motion to impart the oscillating motion to the burnisher levers and bars also reduces the vibrations in the frame of the machine, as by this form of mechanism there are no sudden changes of motion.

In the modification shown in Fig. 4 the burnishers must be so arranged as to be easily changeable, as many different forms are used at short intervals of time, and in Fig. 5 I have shown the manner of securing the burnisher so that it can be easily and quickly removed and replaced. This consists in a spring-catch, t. inserted into the head of the burnisher-barD" and adapted to enter a recess in the upper end of the shank g of the burnisher g, as shown. By this simple device the insertion of the shank 9 up into the head of the burnisher-bar will press the catch back and cause its pointed end to enter the cavity in the shank and hold the tool in place. The strains on the tool 9 all be ing in an upward direction, the spring-catch is only required to hold the weight of the tool and prevent it from falling downward; hence a sharp pull downward is all that is required to remove the tool and an equally-sharp push upward is all that is required to insert it. The insertion and removal of the tool is thusa very simple and easy process.

Having thus described my invention, what I claim as new is 1. In a boot or shoe burnishing machine, a rotating shaft and a drum carried thereby, said drum having 'a sinuous cam-groove, in combination with a lever centrally pivoted to a fixed frame and oscillated by connection with said cam-groove, and a burnisher yieldingly carried by said lever, all arranged substantially as set forth.

2. In a boot or shoe burnishing machine, the combination of the main frame carrying the drum B, provided with cam-groove a,one or more burnisher-levers, D D, pivoted at or near their centers to said frame and having a burnisher-bar, D", and burnisher g in one end, and with anti-friction rollers fitting into said cam-groove on the other end, whereby said burnisher levers and bars are oscillated without producing vibrations in said frame or the work being operated on, substantially as and for the purpose set forth.

3. In a boot or shoe burnishing machine, a burnisher-lever, D, pivoted at or near its center to the frame of said machine and provided with burnisher-bar D, springs 6 within said lever, adapted to render said burnisher-bar flex ible, a burnisher, 9, attached to said burnisherbar, and a gasjet adapted to oscillate with said lever and supply the requisite heat to said burnisher, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN 0. LEE. 

